#all{
	width:980px;
	margin: 0 auto;
}
#body_head{
	width:980px;
	height:100px;
}
#body_body{
	width:980px;
	height:430px;
}
#foot{
	width:980px;
	height:20px;
}
a{
	text-decoration-line: none;
}